Excavating equipment



July 10, 1945. J. A. BRADLEY 2,379,875

EXCAVATING EQUIPMENT Filed June 21, 1944 s Sheets-sheaf 1 v E0 E2 24 luvfntor (7/4/3455 ,4. BRADLEY,

July 10, 1945,

.1. A. BRADLEY EXCAVATING EQUIPMENT Filed June 21 1944 3.SheetsShe et-2 Inver'Ito r /4M5 4. BRADLEX y @400 V W Agtomeys July 10, 1945. J. A. BRADLEY I EXCAVATING EQUIPMENT Filed June 21, 1944 3 Sheets-Sheet 3 r J m, I 4 o v x m w. m m

WW Em Patented July 10, 1945 EXCAVATING EQUIPMENT James noBradlemrittsbmgh, Pa e-155E110! to ache Unitedsalesflorporation, Pittsburgh, Pa, a cor-- ,pnration ofil ennsylvania Amimfion sum 1944, serial No. 54113 i 3 Claims. (.01. 214-i4e s My invention'relates to improvements excavating equipment of the type embodying a dipper. or scoop, and a dipper stick.

the importantobiects -of my invention are to provide a dipper and dipper stick equip-- ment in which powerful down pressure by the dipper stick may be utilized in digging, the power exerted in hoisting the load may be 'util'i zedtoa maximum degree to maintain the dipper closed in hoisting, 'so that spilling from thedippe17 i's bars 8 and the plate 3. Suitable dipper teeth ll extend forwardly from the bottom portion or the.

positively prevented-the dipper "is adequately reinforced against stresses and strain and wear, and adapted to cut Withproper clearance fso as to further obviate wear on the different parts,

and to carry largestones rocks to the dumps, ing location without the same "slipping from the:

dipper. i i Other and subordinate objects are also "comprehended 'hy'my invention, all of which, together with the' precise nature of my improvements, will be readily understood when the succeeding description and claims .are read with reference to the drawings accompanying and forming a part of this specification,

In said drawings; figure 1 is a view in side elevation of my improved dipper equipment in its preferred embodiment, with the 'door'open,

Figure 2 is a view in top plan, Figure 3 is a view in front elevation with the door closed, t

Figure 4 is a view in longitudinal section taken on the line 4 4 of Figure 2. I

Referring to the drawings by numerals, my improved excavatingequipment, as illustrated, comprises a dipper, or scoop, I which, generally speaking, is of rectangular form in vertical sec tion with an open front side facing rearwardly as compared with the usual arrangement. The dipper, or scoop, I comprisesa top plate 3, side plates ,4, a bottom plate 5, a back gate 6 and a plate-like door 1 for opening andclosing the open side2. Horizontal reinforcing bars 8 extend along the top side edges of the dipper l and are riveted, as at 9, to the top plate 3 and, as at H), to the side plates 4. Similar vertical reinforcing plates H extend along the rear edges of the side plates 4 A right angled, cast fyoke; If: is provided at said open side of the dipper?! to extend along and underthe bottom plate Sand upwardly along the s'ideplates t with itsrear edge "flush with the front edges of said plates to form a "wear lip, said yoke being riveted, as at It, to said plates and-'tothe yoke [-5 for the u'suaipurpose. Above the ,dipper teeth H, and 'closelyfadiacent thereto, vertically elongated side cutter teeth 18 are riveted, as at |'9,,to "the sides ofjsaid yoke 1'5 to extend rear wardly and present vertical cutting edges.

"The door 17 is hinged for upward opening mova 1 ment a's follows: A pafirof side bars 20 with side flanges 21 are riveted, as at22, tothe topjofthe door '1 to extend along opposite side edges thereof edge of the same. ,A cross shaftfzfi extending through said ends 23 and ears f2! forms'there with ahinge connection between said door j! and and are riveted thereto and to the plates 8 and i to the side edges of the bottom plate 5, as at I2. The back gate 6 rests on the bottom plate 5 and is held in place by a pair of upper and lower transversely extending rods 13 having the ends thereof detachably attached in any suitable manner in pairs of apertured lugs 14 extending from the back side edges of the side plates 4.

thereof by a cross pin 32. is trained around asheave 34 rotatably mounted between the other ends of said bars 3|, the cable past the upper edge of said door and which terim} f nates in a pair of 'apertured gooseneck rear ends 2.3 interposed between apair of upstanding aper tured cars 23 on the top plate 3 and formed in: tegr'ally with said top plate adjacent the front said topplate 3. i The door 1 is designed to be opened by a pull cable 26 trained around a pullsheave 21 and inclined forwardly of the digger l'for suitable connection to a cable operating mechanism, not shown. The sheave 21 is mounted on a shortv shaft 28 extending crosswise of the door 1 through i the rearends of a cast yoke 29 extending along the top of the door 1 in the vertical center thereof. The cast yoke 29 forms part of door closing means and is provided with a goose-neck exten sion 33 projecting. past the upper edge of the door and the describedhinge connection and which terminates in a free end to which a pair of lifting bars 3| are swingably connected at one end A hoisting cable 33 being designed for operation by the usual means notshown. v

, The dipper stick 35 comprises a pair of side,

skeleton frame sections 36 provided with lower end cap castings 31 formed with depending bearing ears 3%! through which the shaft 25 extends and whereby the dipper! is swingably mounted ,on said dipper stick 35. Pairs of aperturedguide ears 39 upstanding from the top plate 3 upon opposits sides of the bearing ears 38, and through which said shaft 25 also extends, prevents side playof the dipper stick 35 relative to the dipper against flexing.

The ends of the bars 40 are secured to said pairs of ears by pins 43 and M. The brace bars 40;

are provided with longitudinally spaced apertures, as at 45, for selective insertion of the pins 43 therein so that the dipper maybe adjusted about the shaft 25 to tilt the same at different ceptible of modification without departing from top plate 3 adjacent the rear end of the latter. M

the inventive concept, and right is herein reserved to such modifications as fall within the scope of the appended claims.

What I claim is: I

1. In combination, a dipperstick, a dipper depending therefrom and having a door hinged at one edge to the top of the dipperfor downward swinging to close'said sid-e, means to elevate said stick and dipper operative to close said door as an incident to initial elevation of said stick and dipper comprising a yoke on said door having an end-extending across the axis of said hinge,

angles relative to the dipper stick 35, whereby the angle at which the teeth I! will cut, or dig, may be varied to suit operating requirements.

The door 1 maybe provided, on its inner face, and adjacent the bottom edge thereof, with'suitable pick point teeth 46, the function of which is to prevent rocks from slipping out of the dipper when the latter is tilted out of horizontal position and the, door .1. is being closed.

The operation of the described invention will be readily understood. The dipper stick 35, because of .the described arrangement of the dip-.

per I thereon, may be swungdownwardly and forwardly to cause the dipper to dig, and then swung in the reverse direction, by means of the hoisting cable 34, to elevate and incline the dipper l rearwardly and upwardly so that the same will dump. During swinging of the dipper stick 35 rearwardly .and upwardly, the pull of the hoisting cable 34 acts to swing the door I shut on its hinge connection to the, dipper l and to maintain said door .in tightly shut position. Obviously, the door 1 will be shut as the dipper I begins to rise. The manner in which the door I is opened has already been described.

The foregoing will, it is believed, suflice to impart a clear understanding of my invention withoutfurther explanation. I

Manifestly, the invention, as described, is susa sheave on said end of the yoke, and a pull cabletrained around said'sheave, and means to open said door. comprising a second sheave on the other of i yoke, and a pull cable trained around the second sheave. i

2. In combination, a dipper stick comprising a pair'of side sections spaced apart and provided with end cap members having depending bearing ears, a dipper having a top provided at one edge with upstanding ears between which said bearings ears are interposed, a shaft extending through said ears and thereby swingably sus--' pending said dipper foradjustment about said j shaft, a door for said dipper swingably mounted on said shaft, a yoke on said door having a lever forming arm swingable between said side sections, at sheave on saidarm, and a pull cable trained around said sheave for operation be: tween said side sections, and means to adjust said dipper about said shaft into ,difierent set positions.

3. A dipper for useon a dipper stick compris ing'top, side and bottom plates, respectively, and an open front, a reinforcing yoke at said front. of the dipper extending under said bottom plate and upwardly along said side plates andriveted thereto, said yoke forming a digging, lip, dipper teeth extending from the yoke at the bottom andsides of the same, a door for said front hinged to the top, and having pick, point teeth on the r inner face thereof. a l

- JAMES A., BRADLEY. 

